HSRK Series / Class RK1 / High Speed

Protect your electrical power wiring and power semiconductors with a single fuse.

The new HIGH SPEED RK1 (HSRK) combines semiconductor fuse performance with NEC branch circuit compliance. The fuse was designed with two specific applications in mind:

To provide semiconductor fuse performance to solid state drive applications but in the larger RK body sizes that have been typically installed in older systems.
To provide industrial power applications with the most current limiting fuse available, which in turn provides the best arc flash mitigation available to power systems using the larger RK size fuses.

Product Data

[632 KB]

Brochure

[Not Available]

DXF Drawings

UL File Card

CSA File Card

Features

Most current limiting RK1 available
Provides the best Arc flash mitigation for feeder and
branch circuits (non motor load circuits)
Excellent cycling ability for frequent drive starts and
stops without nuisance opening
Extremely Low I2t

Highlights

Current-limiting
Low I2t
Drive protection in larger RK body sizes for older installations
Fast acting

Ratings

AC: AC: (70 to 600A)
600VAC, 200KA I.R., 300KA I.R. Self certified

Approvals

HSRK (70 to 600A)
UL listed to 248-8
CSA certified to C22.2 -
No. 248.8

Applications

Branch circuits
AC drives
Solid state controllers
Feeder circuits
Arc flash mitigation

Ferraz HSRK Series Fuse Selection

AMPERE RATING	CATALOG NUMBER	AMPERE RATING	CATALOG NUMBER	AMPERE RATING	CATALOG NUMBER	AMPERE RATING	CATALOG NUMBER
70	HSRK70R	125	HSRK125R	250	HSRK250R	500	HSRK500R
80	HSRK80R	150	HSRK150R	300	HSRK300R	600	HSRK600R
90	HSRK90R	175	HSRK175R	350	HSRK350R
100	HSRK100R	200	HSRK200R	400	HSRK400R
110	HSRK110R	225	HSRK225R	450	HSRK450R